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ICL - Microlan 2 Communications Board

This 8-bit ISA expansion card from ICL is a Microlan 2 Communications Board for connecting DRS Workstations to PCs.  Microlan 2 was ICL's proprietary serial type Communications System used in the DRS300 and other systems.  It uses an XML2PC v1.0 device driver for Windows 3.0.

The two large chips in the upper left are a Zilog serial communications controller and a custom ICL-specific LSI logic chip. The upper-right portion of the board has it's own ground plane and seems to be mostly analogue electronics with an RS485 interface chip.

Identifying marks:

  • 88808514 PRN 80093195 ICL (C) 1987 MLA04

Date : 1987

Manufacturer : ICL

Format : Expansion Board

This exhibit has a reference ID of CH46129. Please quote this reference ID in any communication with the Centre for Computing History.

Scan of Document: ICL - Microlan 2 Communications Board

Click on the Image For Detail

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